Add a JTextField and a JTextArea to the frame. Initialize the field to an empty string and the text area to “||”. Modify the program so that the contents of the field are appended to the area each time the user clicks the button. For example, if the user enters “xxx” in the field and clicks the button three times, the area contains “||xxx||xxx||xxx||”.

EBK JAVA PROGRAMMING
9th Edition
ISBN:9781337671385
Author:FARRELL
Publisher:FARRELL
Chapter7: Characters, Strings, And The Stringbuilder
Section: Chapter Questions
Problem 3GZ
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Add a JTextField and a JTextArea to the frame. Initialize the field to an empty string and the text area to “||”. Modify the program so that the contents of the field are appended to the area each time the user clicks the button. For example, if the user enters “xxx” in the field and clicks the button three times, the area contains “||xxx||xxx||xxx||”.

Go off this code:

import javax.swing.*;
import java.awt.Color;
import java.awt.event.*;


public class MyCustomFrame extends JFrame
{
   // instance variables - replace the example below with your own
   private JButton button;
   private JLabel label;
   // add two more instance variables for JTextField and a JTextArea t
   // ...
   
   
   private static final int FRAME_WIDTH = 800;
   private static final int FRAME_HEIGHT = 800;
   
   public MyCustomFrame()
   {
      JPanel panel = new JPanel();
      panel.setBackground(Color.RED);
      button = new JButton("Push Me");
      
      // create a listener object and add it to the button
      //...
      
      label = new JLabel("This is a label.");
      final int WIDTH = 10;
      
      // create a JTextField and a JTextArea to the frame. 
      // Initialize the field to an empty string and the text area to “||”. 
      // ...
      
      // add all components into panel
      panel.add(button);
      panel.add(label);
      //add text field and area
      //...
      
      add(panel);
      
      // set the frame size
      setSize(FRAME_WIDTH,FRAME_HEIGHT);
   }

   // write a Clicklisten class to implement interface ActionListener
   //...
   
}

 

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